Colorspace transfer characteristics.
These are as described by https://www.itu.int/rec/T-REC-H.273-201612-S/en
< Rec. ITU-R BT.709-6 / ITU-R BT1361
< ITU-R BT.470-6 System M / ITU-R BT1700 625 PAL & SECAM
< ITU-R BT.470-6 System B, G
< SMPTE ST 170M / ITU-R BT.601-7 525 or 625
< SMPTE ST 240M
< IEC 61966-2-4
< ITU-R BT1361 Extended Colour Gamut
< IEC 61966-2-1 (sRGB or sYCC)
< ITU-R BT2020 for 10-bit system
< ITU-R BT2020 for 12-bit system
< SMPTE ST 2084 for 10-, 12-, 14- and 16-bit systems
< SMPTE ST 428-1
< ARIB STD-B67, known as "hybrid log-gamma" (HLG)
See Implementation
Colorspace transfer characteristics.
These are as described by https://www.itu.int/rec/T-REC-H.273-201612-S/en